Speed discrimination under stabilized and normal viewing conditions.

To determine whether speed discrimination improves when the retinal image is stabilized against the effects of eye movements, thresholds were measured under stabilized and normal viewing conditions. In the normal viewing conditions, eye movements were recorded and used to estimate retinal-image speeds. Stimulus reference speed for sinusoidal gratings varied from 0.5 to 8.0 deg/sec. Results showed that speed discrimination thresholds, expressed as Weber ratios, decreased with increasing stimulus speed for both the normal and stabilized viewing conditions. Stabilized viewing thresholds were higher than normal viewing thresholds only at the slowest stimulus reference speed. However, when speed discrimination thresholds were expressed as a function of the estimated retinal speed, there was no difference in thresholds for the stabilized and normal viewing conditions. A retinal-image model, whereby speed discrimination depends on retinal-image motion, explains the results.

• Publication year

  1996

• Venue

  Vision Research

• Publication date

  1996-06-01

• Fields of study

  Medicine, Psychology

• Identifiers
  DOI 10.1016/0042-6989(95)00270-7PMID 8759450
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

• Visual Science and Engineering: Models and Applications

  1994cited by this paper
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  1992cited by this paper
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  1990cited by this paper
• The perception of target motion during smooth pursuit eye movements in the open-loop condition: characteristics of retinal and extraretinal signals.

  1989cited by this paper
• On the mechanism that encodes the movement of contrast variations: velocity discrimination.

  1989cited by this paper
• Pursuit and optokinetic deficits following chemical lesions of cortical areas MT and MST.

  1988cited by this paper
• Sensitivity of smooth eye movement to small differences in target velocity.

  1987influential reference
• Retinal and Extraretinal Information in Movement Perception: How to Invert the Filehne Illusion

  1987cited by this paper
• Precise velocity discrimination despite random variations in temporal frequency and contrast.

  1986cited by this paper
• Smooth pursuit of small-amplitude sinusoidal motion.

  1985cited by this paper
• Generation-V dual-Purkinje-image eyetracker.

  1985cited by this paper
• Sequential recruitment in the discrimination of velocity.

  1985cited by this paper
• Factors influencing velocity coding in the human visual system.

  1984cited by this paper
• Factors influencing velocity coding in the human visual-system

  1982cited by this paper
• The effect of expectations on slow oculomotor control—III. Guessing unpredictable target displacements

  1981cited by this paper
• A local mechanism for differential velocity detection.

  1981cited by this paper
• On the relativity of perceived motion.

  1981cited by this paper
• The effect of expectations on slow oculomotor control. II. Single target displacements.

  1979cited by this paper
• Motion and vision. II. Stabilized spatio-temporal threshold surface.

  1979cited by this paper
• The effect of expectations on slow oculomotor control. I. Periodic target steps.

  1979cited by this paper
• Pattern thresholds for moving and stationary gratings during smooth eye movement.

  1978cited by this paper
• Temporal frequency response characteristic of motion channels measured with three different psychophysical techniques

  1978cited by this paper
• Three-dimensional visual stimulus deflector.

  1978cited by this paper
• Slow oculomotor control in the presence of moving backgrounds

  1975cited by this paper
• Voluntary control of smooth pursuit velocity

  1969cited by this paper

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